<template>
  <div>
    <!-- 97-1-1：数据统计-通过路由加载数据报表组件 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 97-2-2：数据统计-安装Echarts并渲染Demo图表
       ---为eChart准备一个具备大小(宽高)的Dom -->
      <div id="mian" style="width:750px; height:400px;"></div>
    </el-card>
  </div>
</template>
<script>
// 97-2-1：数据统计-安装Echarts并渲染Demo图表---导入echarts
import echarts from 'echarts'
//
import _ from 'lodash'
export default {
  data() {
    return {
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  created() {},
  //dom创建完成之后执行，此时，页面上的元素已经被渲染完毕了
  async mounted() {
    //97-2-3：数据统计-安装Echarts并渲染Demo图----基于准备好的dom，初始化echarts实列
    var myChart = echarts.init(document.getElementById('mian'))
    const { data: res } = await this.$http.get('reports/type/1')
    if (res.meta.status != 200) {
      return this.$message.error('获取折线图数据失败')
    }
    //97-3-1：获取这些图数据并渲染图表----合并指定图表的配置项和数据
    const result = _.merge(res.data, this.options)
    // 97-3-2：获取这些图数据并渲染图表---展示数据
    myChart.setOption(result)
  },
  methods: {}
}
</script>
<style lang="less" scoped></style>
